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US 10,310,213 B2Granted
Lens control apparatus and control method thereof
AssigneeCanon Kabushiki Kaisha
InventorHideyasu Hongu
Life of this patent
Estimating the term…
Abstract
One or more lens control apparatuses, methods and storage mediums for use therewith are provided herein. In a third mode where a camera control unit performs control in such a manner as to drive a focus lens at a preset speed, if the camera control unit has determined that a subject is a moving subject, when the camera control unit determines that the subject is in focus, a transition is made to a second mode where a drive speed of the focus lens is variably controlled on a basis of the amount of defocus.
Claims14
A lens control apparatus comprising:
- a focus detection unit configured to detect an amount of defocus on a basis of a pair of image signals obtained by an imaging element receiving and photoelectrically converting a pair of light rays with parallax that has passed through a shooting optical system including a focus lens;
- a control unit configured to control drive of the focus lens on a basis of a focus detection result of the focus detection unit;
- a moving subject determination unit configured to determine whether or not a subject is a moving subject;
- and
- a focus determination unit configured to determine whether or not the subject is in focus, on a basis of the amount of defocus, wherein
- in a first mode where the control unit performs control in such a manner as to drive the focus lens on a basis of a preset drive speed, upon the moving subject determination unit having determined that the subject is a moving subject, when the focus determination unit determines that the subject is in focus, a transition is made to a second mode where a drive speed of the focus lens is variably controlled on the basis of the amount of defocus.
3 more elements
A method for controlling a lens control apparatus, comprising:
- a focus detection step of detecting an amount of defocus on a basis of a pair of image signals obtained by an imaging element receiving and photoelectrically converting a pair of light rays with parallax that has passed through a shooting optical system including a focus lens;
- a control step of controlling drive of the focus lens on a basis of a focus detection result of the focus detection step;
- a moving subject determination step of determining whether or not a subject is a moving subject;
- and
- a focus determination step of determining whether or not the subject is in focus, on a basis of the amount of defocus, wherein
- in a first mode where the focus lens is controlled in such a manner as to be driven on a basis of a preset drive speed, upon it having been determined in the moving subject determination step that the subject is a moving subject, when it is determined in the focus determination step that the subject is in focus, the control step includes making a transition to a second mode where a drive speed of the focus lens is variably controlled on the basis of the amount of defocus.
3 more elements
A lens control apparatus comprising:
- a focus detection unit configured to detect an amount of defocus on a basis of a pair of image signals obtained by an imaging element receiving and photoelectrically converting a pair of light rays with parallax that has passed through a shooting optical system including a focus lens;
- a control unit configured to control drive of the focus lens on a basis of a focus detection result of the focus detection unit;
- a moving subject determination unit configured to determine whether or not a subject is a moving subject;
- and
- a focus determination unit configured to determine whether or not the subject is in focus, on a basis of the amount of defocus, wherein
- in a first mode where the control unit performs control in such a manner as to drive the focus lens on a basis of a preset drive speed, even upon the moving subject determination unit having determined that the subject is a moving subject, the control unit performs control in such a manner as to drive the focus lens on the basis of the preset drive speed until the focus determination unit determines that the subject is in focus, and
- in a second mode where a drive speed of the focus lens is variably controlled on the basis of the amount of defocus, upon the moving subject determination unit having determined that the subject is a moving subject, the drive speed of the focus lens is variably controlled on the basis of the amount of defocus irrespective of the preset drive speed.
4 more elements
A method for controlling a lens control apparatus, comprising:
- a focus detection step of detecting an amount of defocus on a basis of a pair of image signals obtained by an imaging element receiving and photoelectrically converting a pair of light rays with parallax that has passed through a shooting optical system including a focus lens;
- a control step of controlling drive of the focus lens on a basis of a focus detection result of the focus detection step;
- a moving subject determination step of determining whether or not a subject is a moving subject;
- and
- a focus determination step of determining whether or not the subject is in focus, on a basis of the amount of defocus, wherein
- in a first mode where the focus lens is controlled in the control step in such a manner as to be driven on a basis of a preset drive speed, even upon it having been determined in the moving subject determination step that the subject is a moving subject, the focus lens is controlled in the control step to be driven on the basis of the preset drive speed until it is determined in the focus determination step that the subject is in focus, and
- in a second mode where a drive speed of the focus lens is variably controlled on the basis of the amount of defocus, upon it having been determined in the moving subject determination step that the subject is a moving subject, the drive speed of the focus lens is variably controlled on the basis of the amount of defocus irrespective of the preset drive speed.
4 more elements
Dependencies are inferred from the claim text.